Type-writing machine.



R. H. STROTEER.

TYPE WRITING MACHINE.

APPLICATION FILED JAN. 27, 1910.

Patented Apr. 25, 1911.

3 SHEETSr-SHBET 'l.

INVENTEIFQ: 2M Jw/lg ag [3 f V/4/M \A/ITNEEEEE Hi5: ATTURNE):

R. H. STROTHER. TYPE WRITING MACHINE.

APPLICATION FILED mmzv, 1910.

990,312., Patented Apr. 25, 1911.

3 SHEETS-SHEET 2.

- /EM M/Md;

' 1- 15 ATTEQRNEY R. H. STROTHER. TYPE WRITING MACHINE. APPLICATIONFILED JAN. 27, 1910-.

L 1 9 1 5 2 R P. A d e t n e LIJ a P 3 SHBBTSSHEET 3.

INVENTUR WITNEES'K: 5 Z%%;%

1-115 TTEJRNEY from the npper stripe of the ribbon; a snowing themechanism to print irom trio ROBERT E. STROTHER, OF \MIOINTCLAIE NEWJERSEY, ASSIGNOR TO U N193 TYPE- VVRZTTER COMPANY, OF ILION, NEW YORK, ACORPORATION OF NEJV YQE'K.

rvrnwnirrne Macrame.

canals.

Specification of Letters Patent. Patented Apr, li filll Applicationfiled January 27, 1910. Serial No. 540,426.

To all whom it may concern:

Be it known that 1, ROBERT H. S'rno'rrrnn, citizen ofthe United States,and resident of Montclain'in the county of Essex and State of NewJersey, have. invented certain new and useful Improvements inType-Writing Machines, of which the following is a specification.

My invention relates to typewriting 'machines and. more particularly tothe ribbon mechanism of such machines.

My invention has for its object to provide improved mechanism forvibrating the ribbon of a visible typewriter; to provide a changeableconnection whereby the ribbon can be tin-own dilierentextents at eachvibration, in order to print from either one of a. plurality of stripesof the ribbon; to provide means whereby the ribbon vibrator is notthrown. to printing position when it is desired to do mnncograph work,and other objects as will appear hereafter.

To the above ends, my invention consists in certain features ofconstruction and combinations and arrangements of parts, all of whichwill be fully set forth herein and particularly pointed out in theclaims.

In the accompanying drawings :-Figure 1' is a. side view, in verticalsection, of a type writing machine having my invention embodied therein.Figs. 2, 3 and i are diagrammatic side views on an enlarged scale withparts in section and parts broken away; i 2 showing the mechanisnrset toprint ribbon vibrator. It is here shown applied to a Monarch typewriter.

' he main frame or" that machine coinp [568 base 1, corner posts 2 and atop 1 plate 3, saidbase comprising, among other things, across bar 4about midway of the length of the machine. A platen 5 is mounted on acarriage which is not shown, but which is drawn across the machine by aspring drum (3 in a manner well-known in the art. The ribbon 7 iscarried by spools 8 mounted above the top plate and driven from thespring drum 6 by a train of gearinglO. The ribbon is threaded through avibrator 11 having a depending stem 12 and guided on a fixed standard orguide 13. These parts may be of the. ordinary Monarch construction or ofany other suitable construction A series of printing key let, havingkeys 15 on their forward ends, operate a series of. sub-levers 1% whichare connected by links 17 with front-strike type,

bars 18 mounted on a segment 1. The sublevers 16 are pivoted to thekey-levers and each of them cooperates with the fixed fulcrum rod 20.The segment 19 is shiftable up and down for upper and lower caseprinting. A universal bar 21, lying beneath the key levers, forms partof a frame which also comprises arms 22 which are rigidly mounted on arockshaft 23, which is ionrnaled at its ends in brackets 24: dependingfrom the transverse frame bar 4. Said universal bar is held. up in itsnormal position by a returning spring In addition to the end arms 2, theuniversal bar frame con c ses another arm 26 which projects some disrnce standing link which operates f nientmechanism of the machine. ruffbon vibrating mechanism is also connec- V with this arm 26 and itcomprises a bell crank pivoted to the side of arm at Said bell crank hasa forwardly extenders arm and a downwardly extending 3 31, saidforwardly extending arm being con nectcd bya link 32 with a lever 3303",the third order which is pivoted at 34: in a bracketlo depending" fromthe top plate of the machine. Said leverSS has in. its forward end anopen slot that receives a cross pin 36 of the stem. 12'ofthe ribbonvibrator. hen any printing key is operated the pivot 28 of the bellcrank 30, 31 moves downward and said bell crank swings to a certain extent on said pivot. l have provided means for controlling this swingingmotion of the fi l RAH

bell crank. When itis desired to print from the lower stripe of theribbon the bell crank is allowed to swing but little so that the forward end of it moves down about as far the rear end or possibly farther.When it is desired to print from the upper stripe of the ribbon atgreater extent of swinging motion is imparted to the bell crank so thatthe forward end of it doesnot move down so far, andwhen, it is desiredto leave the vibrator stationary the bell crank is caused to swing aboutits pivot to such an extent that the forward end of said bell crank issub stantially stationary.

A bracket 37, having the form shown in Figs. 1 and 6, is rigidly mountedon the underside of the cross bar 4- by means of screws 38 passingthrough an earO bent oil hori-- cont-ally from said bracket, which.bracket lies in part by-thc side of the arm 26 of the universal barframe, and has an ear il bent oil therefrom which receives the upper endof the returning spring 25. The rear end of the bracket 37 hasjournalecl therein the left hand end of a transverse rockshaft4l2, theright hand end of which is pivoted in a bearing block 43 detachablysecured to the right hand side plate of the base 1 of the machine. At.its right hand end said rock has rigidlv mounted thereon the hub 44. ofan upright'arm tithe free end of which has pivoted thereto at d6 therear end of a bar 47 which extends to the front of the machine, where itis formed with a linger iece 48 for moving said car in a front or ackdirection. The forward end of the bar 47 is formed with an elongatedslot 50 through which passes a shouldered and head ed screw 51 that isthreaded into a plate .52 whichis detachably secured to the side bar ofthe machine by means of screws 53. The upper art of this plate is markedwith lines 54 to indicate the dilterent settings of the bar, said linescooperating'with apointer 55 said shaft 42 carries an arm 61 to theforward end of which at 62 there is pivoted a' formed on the bar 47.There are three of the designations 54: marked" Mimeo. Black and Bed. Inorder to maintain the bar in either of its positions corresponding tothese designations, a plate spring 56 is secured to the side of the bart? by a screw 57, and this spring carries a pointed pm 58 which passesthrougha hole in the bar l7 and is adapted to enter any one of threeconi-' cal depressions :59 in the plate 52. It will, of course, beunderstood that'when the finger. piece 48 is moved in either directionit rocks the shaft 42. At its left hand end,

link 63 the free end of which is pivoted at 64, Fig. 6, to the dependingbell crank arm 31. The link 63 is a guide link or controlling link forcontrollin the operation of the bell crank 30,v 31. When the parts are1n normal position the pivot screw 64 and the same center. so that thelower end of the link practically no motion at all in an up ""MimeoW,the pivot 62 stands directly 0pposits, or substantially so, to the lowerend of the link-32 where said link is pivoted to the lever arm 80, thisbeing the position of the parts shown in Fig. 4. When the universal baris depressedby the operation of a printing key, the parts move to therespective positions indicated by the heavy broken lines 30, 31 and 63in Fig. l. Thelink 68 is compelled to turn about the pivot 62 as acenter, and in doing so it compels the bell crank 39, 31 to turnapproximately about the 32 remains nearly stationary and the vibratorstands substantially stationary. The lower end of the link 32 has a ver'slight motion in a, front and back direction, but

and down direction. The result is that the 'ribbon vibrator is notoperated.

When the pointer'55 idnioved opposite; the line 54 marked Black, asshown m Fig. 6,, the parts assume the position shown in Figs. l and-2 inwhich the pivot 62 is somewhat be low the lower-end of the link 32 andin which the link 63 has an inclination forward and somewhat upward. Ifnew a printing key be operated the universal bar will be depressed,moving the pivot 28 to the point 'marked 28 and the other parts willassume the positionsindicated b the heavy broken I lines in the figure.f'lh'e ink 63 will pull the arm 31' forward to the position marked 31"and the other parts will assumerespe'ctively the positionsma-rked' 30",63", 32 and 33". The lower end ofthe link 32 will move down-' ward butnot to the same extent as the pivot 28 so that the. vibrator is operatedjust .110 enough to bring the upper stripe of the ribbon to the printingpoint. i"

When the'pointer 55 is moved forward to the-position marked Red, theparts assame the positions showh in Fig. 3, where 1-16 the link 63 islower than it is shown in Fig. 2; \Vhen a printing key is operated theparts assume the respective positions marked 63, 31, 30, 32 and 33. Theforward end of the lever arm 30 moves downward fully as far as the pivot28, with the result that the vibrator is thrown to a higher point th anin Fig.2 so as to print from the lower stripe of the ribbon.

The link 63 may be called a guide link or controlling link forcontrolling the operation of the floating lever 30, 31. The pivot screw62 may be called ananchor or anchorage for said guide link and the arm61 a support for said anchorage. It will be seen that th s of saidsupport coincides with the normal position of the pivot 64 at the freeend of the link 63; that means are provided for moving this supportabout its pivot to move-the anchorage 62 to a series of positions forvarying the throw of the vibrator, and that in one of these positionssaid anchorage is aproximately -co-axial with the free end of the everarm 30, in which last position the ribbon vibrator is not operated,

Various changes can ating said vibrator, said operating means ineludinga floating lever and means for operating said vfloating lever; a guidefor one arm of said floating lever, and means for moving said guide tochange the motion of said lever arm and thereby to change the operationof said lever on said vibrator.

2. In a typewriting machine, the combina-' tion of a ribbonvibrator,means for operating said vibrator, said operating means including afloating lever and means for operating said lever; a guide link for oneof the arms of said lever, and means for anchorage of said guide link inorder to change the operation of said lever on said vibrator. i

3. In a typewriting machine, the combination of a ribbon vibrator, afloating bell crank having one. arm thereof operatively connected withsaid vibrator, a guide for the other arm of said bell crank, means formoving said guide to change the direction of m0- tion of said other arm,and means for operating the bell crank.

4. In a typewriting machine, the combination of a ribbon vibrator, afloating bell crank, a device operatively connected With said vibratorand pivoted to one of the arms arm of said bell crank, and means forchangof said bell crank, a guide link for the other ing the point ofanchorage of said guide link to vary the operation of said bell crank onsaid device, said means including means for locating said anchoragesubstantially coaxialwith the point at which the device is pivoted tosaid and whereby said bell crank is rendered ineffective to operate saidvibrator.

5. In a typewriting machine, the combination of a ribbon vibrator, afloating lever, a

device operatively connected to said vibrator and pivoted to one arm ofsaid floating lever, means for a guide for another arm of said lever,and means for moving said guide, said moving means including means forsetting said guide so as to cause said floating iever when be made inthe details of construction and arrangement without changing the saidvibrator.

operating said floating lever,

operated to turn substantialiy about the point at which said device ispivoted to said lever,-whereby said lever is rendered ineffective tooperate said vibrator.

6. In a typewriting machine, the combina tion of a ribbon vibrator, adevice operatively connected with said ribbon vibrator, a part pivotedto said device, means for operating said part, a guide link for changingthe point of anchorage of said guide link, said means including meansfor locating said point ofanchorag e substantially co-axial with thepoint at which said device is pivoted to said part, whereby said part isrendered inefl'ect-ive to operate said vibrator.

7 In a typewriting machine, the combination of a ribbon vibrator,printing key levers, a uniyersal bar, a lever arm connected with saiduniversal bar, a floating lever mounted on said lever arm, a deviceopera tively connected with said ribbon vibrator and pivoted to an armof said floating lever, a guide or controller for said floating lever,and means for moving said guide or con troller to vary'the action or"said floating lever on said vibrator.

8. In a typewriting machine, the combination of a ribbon vibrator, auniversal. bar, an arm connected with said universal bar, a floatinglever mounted on said arm, a device operatlvely connected with saidvibrator and ivoted to said floating lever, a guide link or said floatinlever, and means for changingthe point 0 anchorage of said guide link tovary the action of said floating lever on said device.

'9. In a typewriting machine, the combination of a ribbon vibrator, auniversal bar, an

arm connected with said universal bar, a.

floating lever mounted on said arm, a device operatively connected withsaid vibrator and pivoted to said floating lever, a .ide link for saidfloatin ing the point 0 anchorage of said guide link to vary the actionof said floating lever on said guide, link, said changing means includinmeans for locating said anchorage sub stantially co-axial with the pointat which the device is pivoted tosaid lever arm to render said floatinglever ineffective to operate ,10. In a 'typewriting machine, thecombination of a ribbon vibrator, a floating lever, a device operativelyconnected with said vibrator and pivoted to an arm of said floatingcontrolling the motion of said part, and means for lever, and means orchanglever, a guide link pivoted to another arm of said lever, an anchorfor said guide link, a pivoted support for said anchor having itspivotal axis coincident with the sition of the point at which said guidelink is pivoted to said floating lever, and means for adjusting saidsupport about its pivot.

11. In a typewriting machine, the combinormal po- & 990,312

of New York, in the county ofNew York and State of New York, this 26thday of January, A. D. 1910.

1 ROBERT H. STRQTHER. Witnesses:

E. M. WELLS, M. F. H NNWEBER.

